Nut-lock



S. LAR SON.

Nut-Look.

Pat-ented-Feb. 10,1880.

N. PETERS. PNCTO-LITHDGRAPMER. WASHINGTON, D. C

" "UNITED STATES PATENT OFFICE.

SWAN LARSON, on MONMOUTH, ILLINOIS.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 224,448, dated February10, 1880.

Application filed December 6, 1879.

To all whom it may concern:

Be it known that I, SWAN LARSON, of Montion, in which- Figure'l is aside elevation of a railwayrail and fish -plate, showing my invention asapplied thereto Fig. 2 is a front elevation of the nut-lock alone. Fig.3 is a sectional view in the line at w in Fig. 2. Fig. 4 is aperspective view, showing the parts of the nut-lock separately.

My invention relates to certain new and useful improvements in theclass'of nut-locks employinga cup-shaped washer-containing a. spring anda follower; and it consists in constructions and combinationshereinafter described, and set forth in the claims hereto annexed.

Referring to the drawings by letters, Arepresents a portion'of arailway-rail; B, a fishplate; 0, a bolt, and D a nut for securing thefish-plate to the rail.

E is the base-plate of my nut-look, and has a central hole, 6,. throughwhich the bolt 0 passes; an annular groove, 6, in which ayielding ring,F, of rubber or other suitable mate rial, is seated lugs e, which restagainst the bottom flange, a, of the rail A, to prevent the base E fromturning on the bolt 0; and recesses e' and lugs 6, for purposeshereinafter described. e

G is a ring seated on the rubber'F, as

shown in the drawings, andhas cam-shaped projections 9 extendingoutwardly from its outer side. For useon a bolt wit-h a righthandscrew-thread, the upper faces of the cams g are inclined as shown" inthe drawings, and have sharp corners or edges g, and for use with a bolthaving a left-hand thread the upper faces of the cams g may be inclinedin an opposite direction to that iugs.

H is a ring-resting on the rubber F, be

tween the ring G and. the outer flange, E, of

shown in the drawthe base-plate E. The ring H has inwardlyprojectinglugs h, which rest between the cams g and prevent the ring G'frornturning, and is itself prevented from turning bylugs h, which rest inrecesses ein the plate E.

The lugs 6" may be turned down upon the ring H, to secure it in place,and thereby hold the ring G and rubber F in place in the baseplate E, sothat the device is in convenient shape to applyon a bolt. 4

As the nut D is screwed down on the bolt its inner face willpress uponthe cams g and force the ring G down upon the rubber spring F, and theresiliency of the springF willforce the nut outward, and thereby tend toprevent it beingjarred loose on the bolt. The sharp corners g of thecams 9 will out into the adjacent face of the nut, and thereby also aidin looking the nut. The cams g project slightly beyond the ring H, asshown at Fig. 3 of the drawings, so as to receive the greatest pressureof the nut, and so that when forced inward by the nut, it (the nut) mayalso press upon the ring H, which also rests upon. the yielding spring Fand is forced toward the nut thereby.

The lugs e on the base-plate E, or other equivalent devices, maybe usedto hold'the nut-lock from turning in other situations than for railwayfishplates.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a nut-lock, t-hecombination, with a base-plate, E,-l' javing acentral hole, 0, and an annular groove, 0, containing a spring, F, andthe holding-ring II, of the ring G, substantially as and for the purposeherein shown and described i i 2. In nut-lock, the combination, with abase-plate. E, having a central hole, 0, and an annular groove, 0,containing a spring, F, of the ring G, having cams g, and the ring Hhaving lugs h, for holding-the ring G in place, substantially inthe'manner herein shown and described.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

SWAN LARSON.

Witnesses A. .S. YoUNe v sT, LARS LARssON.

